Cardiac Output

Input:
O2 Consumption
Hgb
O2Sat
PaO2
O2vSat
PvO2
Results:
CaO2
CvO2
CO
 
Decimal Precision:
CaO2 = ( Hgb * 13.4 * O2Sat / 100 ) + ( PaO2 * 0.031 )
CvO2 = ( Hgb * 13.4 * O2vSat / 100 ) + ( PvO2 * 0.031 )
CO = O2Consumption / (CaO2 - CvO2)
In this calculation, arterial oxygen content CaO2 and venous oxygen content CvO2 are calculated by using both oxygen saturation and oxygen tension of both blood samples.
 
O2 Consumption may be determined by
  • Separate calculation
  • Machine measurement
  • Estimation/assumption of approximately 250cc/min in a healthy person
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